> For the complete documentation index, see [llms.txt](https://docs.smartfastpay.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smartfastpay.com/resources/faq-and-support.md).

# FAQ & Support

- [How to get the token](https://docs.smartfastpay.com/resources/faq-and-support/authentication.md): Your access token authorizes you to use the SmartFastPay REST API server. To call a REST API in your integration, exchange your client ID and secret for an access token in an OAuth 2.0 token call.
- [Tests to validate your integration](https://docs.smartfastpay.com/resources/faq-and-support/tests-validate-integration.md)